The fruit store shipped 120 kg more apples than bananas, and the apples were three times heavier than bananas. How many kilograms of bananas are shipped?
水果店运来的苹果比香蕉多120千克，苹果的重量是香蕉的3倍．运来香蕉多少千克？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<result>60</result>