Subtract a natural number from the numerator of (11/53), add this natural number to the denominator, and divide it into (1/7). What is this natural number.
(11/53)的分子减去一个自然数，分母加上这个自然数，然后约分为(1/7)．这个自然数是多少．
<gadget id="calculator">11 + 53</gadget>
<output>64</output>

<gadget id="calculator">1 + 7</gadget>
<output>8</output>

<gadget id="calculator">64 / 8</gadget>
<output>8</output>

<gadget id="calculator">8 * 1</gadget>
<output>8</output>

<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<result>3</result>