0.45-(10-(0.2+6.37/0.7))*0.5=how much.
0.45-(10-(0.2+6.37/0.7))*0.5=多少．
<gadget id="calculator">6.37 / 0.7</gadget>
<output>9.1</output>

<gadget id="calculator">0.2 + 9.1</gadget>
<output>9.3</output>

<gadget id="calculator">10 - 9.3</gadget>
<output>0.7</output>

<gadget id="calculator">0.7 * 0.5</gadget>
<output>0.35</output>

<gadget id="calculator">0.45 - 0.35</gadget>
<output>0.1</output>

<result>0.1</result>