Simple calculation: 25.8-15.8*0.65.
简便计算：25.8-15.8*0.65．
<gadget id="calculator">15.8 * 0.65</gadget>
<output>10.27</output>

<gadget id="calculator">25.8 - 10.27</gadget>
<output>15.53</output>

<result>15.53</result>