Subtract the quotient of 7.29 divided by 0.81 from 9.75, and then subtract 0.28 from the difference. What is the difference?
从9.75里减去7.29除以0.81的商，所得的差再减去0.28，差是多少？
<gadget id="calculator">7.29 / 0.81</gadget>
<output>9</output>

<gadget id="calculator">9.75 - 9 - 0.28</gadget>
<output>0.47</output>

<result>0.47</result>