1.8*1.9+0.35**2=how much.
1.8*1.9+0.35**2=多少．
<gadget id="calculator">1.8 * 1.9</gadget>
<output>3.42</output>

<gadget id="calculator">0.35 ** 2</gadget>
<output>0.1225</output>

<gadget id="calculator">3.42 + 0.1225</gadget>
<output>3.5425</output>

<result>3.5425</result>