The remainder obtained by dividing 715 and 903 by a natural number is the same, and the quotient difference is 4. Find out what this number is.
用一个自然数去除715和903所得余数相同，且商相差4．求这个数是多少．
<gadget id="calculator">903 - 715</gadget>
<output>188</output>

<gadget id="calculator">188 / 4</gadget>
<output>47</output>

<result>47</result>