Subtract the difference between 1.54 and 0.31 from 1.28, multiply the difference by 9.4, what is the product?
1.28减去1.54与0.31的差，所得的差再乘9.4，积是多少？
<gadget id="calculator">1.54 - 0.31</gadget>
<output>1.23</output>

<gadget id="calculator">1.28 - 1.23</gadget>
<output>0.05</output>

<gadget id="calculator">0.05 * 9.4</gadget>
<output>0.47</output>

<result>0.47</result>