Subtract the product of 0.4 times 2 from 4.6. What is the difference?
从4.6里减去0.4乘2的积，差是多少？
<gadget id="calculator">0.4 * 2</gadget>
<output>0.8</output>

<gadget id="calculator">4.6 - 0.8</gadget>
<output>3.8</output>

<result>3.8</result>