Take out 2 kilograms of fruit from a basket, and there are 10.5 kilograms left, and then take out another 2.5 kilograms, and the final remaining fruit is the amount of all the fruits.
一筐水果取出2千克，还剩下10.5千克，再取出2.5千克，最后剩下的水果是全部水果的多少．
<gadget id="calculator">10.5 - 2.5</gadget>
<output>8</output>

<gadget id="calculator">2 + 10.5</gadget>
<output>12.5</output>

<gadget id="calculator">8 / 12.5</gadget>
<output>0.64</output>

<result>0.64</result>