The number of A is 47 less than 28 times of 15. What is the number of A?
甲数比15的28倍少47，甲数是多少？
<gadget id="calculator">15 * 28</gadget>
<output>420</output>

<gadget id="calculator">420 - 47</gadget>
<output>373</output>

<result>373</result>