There is a peach tree, a monkey ate the peaches, on the first day (1/10), on the second day (1/9)...on the ninth day, it ate the peaches (1/2), eat up all 10 peaches on the tree on the tenth day, how many peaches are there on the tree?
有一棵桃树，一只猴子偷吃桃子，第一天偷吃了(1/10)，第二天偷吃了当天树上的(1/9)…第九天偷吃了当天树上的(1/2)，第十天将树上的10个桃子全部吃完，树上原有多少个桃子．
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<result>100</result>