Fourteen boys and 21 girls will be equally divided into groups. Find the greatest number of groups that can be created if no one
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You wouldn't add 1, but multiply. First multiply all factors with the same base. When you do that, their exponents get added:
Notice how . The factor with zero exponent contributes nothing new to the product, so the effect is the same as multiply
by 1. In general,
for any non-zero number
.