How many consecutive zeros are there at the end of the product 1*2*3*4*100?
乘积1*2*3*4*100的最后有多少个连续的零．
<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<gadget id="calculator">100 / 25</gadget>
<output>4</output>

<gadget id="calculator">20 + 4</gadget>
<output>24</output>

<result>24</result>