There are 150 kilograms of bananas in the store, 50 kilograms are sold in the morning, and 70 kilograms are sold in the afternoon. How many kilograms of bananas are there? How many
商店有150千克香蕉，上午卖出50千克，下午卖出70千克，现有香蕉多少千克？多少
<gadget id="calculator">50 + 70</gadget>
<output>120</output>

<gadget id="calculator">150 - 120</gadget>
<output>30</output>

<result>30</result>