Find the number obtained by subtracting 7 from a number and multiplying 7 by 7 to get the same difference as subtracting 11 from it.
一个数减去7的差再乘7所得的积与它减去11的差相等，求这个数．
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<gadget id="calculator">49 - 11</gadget>
<output>38</output>

<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">38 / 6</gadget>
<output>19/3 = around 6.333333</output>

<result>19/3 = around 6.333333</result>