Calculate with a simple method: 3.2*(2.5+12.5).
用简便方法计算：3.2*(2.5+12.5)．
<gadget id="calculator">2.5 + 12.5</gadget>
<output>15</output>

<gadget id="calculator">3.2 * 15</gadget>
<output>48</output>

<result>48</result>