The fruit base transports a batch of navel oranges, which can be shipped in 150 large boxes or 250 small boxes. It is known that each small box contains 30 kilograms less than each large box, so how many kilograms are there in total for this batch of navel oranges?
水果基地运送一批脐橙，用150个大箱可以装运完，用250个小箱也可以装运完．已知每个小箱比每个大箱少装30千克，那么这批脐橙共多少千克？
<gadget id="calculator">250 - 150</gadget>
<output>100</output>

<gadget id="calculator">150 / 100</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">30 * (3/2) * 250</gadget>
<output>11_250</output>

<result>11_250</result>