What is the sum of 4 0.01 and 9 0.1?
4个0.01和9个0.1合起来是多少．
<gadget id="calculator">4 * 0.01</gadget>
<output>0.04</output>

<gadget id="calculator">9 * 0.1</gadget>
<output>0.9</output>

<gadget id="calculator">0.04 + 0.9</gadget>
<output>0.94</output>

<result>0.94</result>