38.4*7.6-3.84*66.
38.4*7.6-3.84*66．
<gadget id="calculator">38.4 * 7.6</gadget>
<output>291.84</output>

<gadget id="calculator">3.84 * 66</gadget>
<output>253.44</output>

<gadget id="calculator">291.84 - 253.44</gadget>
<output>38.4</output>

<result>38.4</result>