How to count 1 10000 crabs?

1. First, choose 50 crabs and weigh their total weight.

2. Secondly, calculate the ratio of 50 crabs to the weight.

3. Through the calculation of mathematical formula, the number of crabs can be correctly counted by multiplying the total weight of existing crabs by the proportion, and 1 10,000 crabs can be counted by weighing, without manual counting.

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