There are the same number of balls in 5 boxes. If 60 balls are taken from each box, the remaining balls in the 5 boxes are equivalent to the number of balls in the original 2 boxes. How many balls are in each box? Only a ball?
在5个箱子里放着同样多的皮球，如果从每个箱子里拿出60只皮球，则五个箱子里剩下的皮球相当于原来2个箱子的皮球数，每个箱子里原来有多少只皮球？
<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">5 * 20</gadget>
<output>100</output>

<result>100</result>