The fruit shop shipped 15 boxes of apples and 15 boxes of bananas. The mass of each box of apples was 25 kg, and the mass of each box of bananas was 20 kg. How many kilograms of fruit did the fruit shop ship in total?
水果店运来苹果、香蕉各15箱，每箱苹果的质量为25千克，每箱香蕉的质量为20千克．水果店一共运来水果多少千克．
<gadget id="calculator">15 * 25</gadget>
<output>375</output>

<gadget id="calculator">15 * 20</gadget>
<output>300</output>

<gadget id="calculator">375 + 300</gadget>
<output>675</output>

<result>675</result>