45*0.63+4.5*3.7-4.5*10=how much.
45*0.63+4.5*3.7-4.5*10=多少．
<gadget id="calculator">45 * 0.63</gadget>
<output>28.35</output>

<gadget id="calculator">4.5 * 3.7</gadget>
<output>16.65</output>

<gadget id="calculator">4.5 * 10</gadget>
<output>45</output>

<gadget id="calculator">16.65 - 45</gadget>
<output>-28.35</output>

<gadget id="calculator">28.35 + (-28.35)</gadget>
<output>0</output>

<result>0</result>