What is the product of the difference between 5.04 and 4.05 multiplied by 88?
5.04与4.05的差乘以88，积是多少．
<gadget id="calculator">5.04 - 4.05</gadget>
<output>0.99</output>

<gadget id="calculator">0.99 * 88</gadget>
<output>87.12</output>

<result>87.12</result>