Calculation: 31.7-0.5*0.7-1.65.
计算：31.7-0.5*0.7-1.65．
<gadget id="calculator">0.5 * 0.7</gadget>
<output>0.35</output>

<gadget id="calculator">31.7 - 0.35 - 1.65</gadget>
<output>29.7</output>

<result>29.7</result>