What is the result of subtracting 0.75 from the sum of 21.3 and 8.75?
从21.3与8.75的和里减去0.75，结果是多少？
<gadget id="calculator">21 + 8.75</gadget>
<output>29.75</output>

<gadget id="calculator">29.75 - 0.75</gadget>
<output>29</output>

<result>29</result>