Simple calculation: 9.81*0.1+98.1*0.5+981*0.049.
简便计算：9.81*0.1+98.1*0.5+981*0.049．
<gadget id="calculator">9.81 * 0.1</gadget>
<output>0.981</output>

<gadget id="calculator">98.1 * 0.5</gadget>
<output>49.05</output>

<gadget id="calculator">981 * 0.049</gadget>
<output>48.069</output>

<gadget id="calculator">0.981 + 49.05 + 48.069</gadget>
<output>98.1</output>

<result>98.1</result>