You need to factor 10000. Just divide it by 5 till you no longer can, then divide by 2 till you reach 0.
After that, all you have to do is multiply all the 5s for the first number, and all the 2 for the second number. The result's 625 and 16. Try it.
After that, all you have to do is multiply all the 5s for the first number, and all the 2 for the second number. The result's 625 and 16. Try it.
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got no idea