The fruit shop shipped 5 boxes of pears. If 30 kilograms are taken out of each box, the weight of the remaining pears in the 5 boxes is exactly equal to the weight of the original 2 boxes of pears. How many kilograms per box of pears?
水果店运来5箱梨，如果从每只箱子里取出30千克，那么5只箱子里剩下梨的重量正好等于原来2箱梨的重量．原来每箱梨多少千克？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">30 * (5/3)</gadget>
<output>50</output>

<result>50</result>