Kesuvos 93a discusses the case of a man who has three wives, and, for illustrative purposes, the wives’ Kesuvos are for $100, $200, and $300, respectively. The man dies. For the sake of simplicity, I will address the standard cases, as explained in the Gemara, rather than the more convoluted ones that are actually listed in the Mishnah. Further, my explanation of these cases reflects Rashi’s.
Case 1: The man’s estate is worth $100. Since everyone’s claim is at least $100, they all are claiming the entire estate, and as such, they split it equally, that is, $33.33 each.
Case 2: The man’s estate is worth $200. All three widows are claiming the first $100, and as such, they split that equally. However, only the two widows with the larger claims are claiming the second hundred - the one claiming $100 admits that she has no portion in the second $100. As such, only the widows claiming $200 and $300 take a share of this portion of the estate, splitting it $50-$50. Overall, the three widows split it $33.33-$83.33-$83.33.
Case 3: The man’s estate is worth $300. Following the same logic as the previous case, all three widows get $33.33 each from the first $100, two widows get $50 each from the second $100, and only one widow gets money from the last $100 and therefore gets the entire sum. They therefore split the entire estate $33.33-$83.33-$183.33.
And there the Gemara ends.
What happens when the estate is worth, say, $400? In that case, nobody is claiming the fourth $100. Does that mean they split it equally? Does the entire sum go to one widow, and the leftovers to a second widow? Does no widow get it, and it goes to the orphans as their inheritance? If this last option is correct, does that mean that when there’s $600, the estate goes to the widows and covers their claims entirely, or do they still fight over the first $300, and the other $300 are left for the orphans?