Calculation: 10.31*2.5-0.31*2.5=how much.
计算：10.31*2.5-0.31*2.5=多少．
<gadget id="calculator">10.31 * 2.5</gadget>
<output>25.775</output>

<gadget id="calculator">0.31 * 2.5</gadget>
<output>0.775</output>

<gadget id="calculator">25.775 - 0.775</gadget>
<output>25</output>

<result>25</result>