In the product 1*2*3*…*98*99*100, how many zeros are there at the end?
在乘积1*2*3*…*98*99*100中，末尾有多少个零．
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">16 + 8</gadget>
<output>24</output>

<result>24</result>