The average of the three-digit number 3A9 and the three-digit number C7E is 287, so what is the difference between these two numbers.
三位数3A9与三位数C7E的平均数287，那么这两个数的差是多少．
<gadget id="calculator">399 - 175</gadget>
<output>224</output>

<result>224</result>