The sum of 0.5 plus a number is equal to the product of 0.38 and 75. What is this number?
0.5加上一个数的和等于0.38与75的积，这个数是多少？
<gadget id="calculator">0.38 * 75</gadget>
<output>28.5</output>

<gadget id="calculator">28.5 - 0.5</gadget>
<output>28</output>

<result>28</result>