There is 200mL of water in a measuring cup. When an apple is put into it, the water level rises to 320mL. What is the volume of the apple?
一个量杯中装有200mL的水，当放入一个苹果后水面上升到320mL的位置，这个苹果的体积是多少．
<gadget id="calculator">320 - 200</gadget>
<output>120</output>

<result>120</result>