There are 5 boxes of biscuits in a grocery store. If 15 kilograms are taken out of each box, the biscuits left after 5 boxes are exactly equal to the original two boxes of biscuits. How many kilograms of biscuits are in each box?
某食品店有5箱饼干，如果从每个箱子里取出15千克，那么5个箱子了剩下的饼干正好等于原来的两箱饼干．原来每个箱子里装多少千克饼干？
<gadget id="calculator">15 * 5</gadget>
<output>75</output>

<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">75 / 3</gadget>
<output>25</output>

<result>25</result>