A number is first added by 3, then divided by 3, then subtracted by 5, and then multiplied by 4, the result is 56, what is this number?
一个数先加3，再除以3，然后减去5，再乘以4，结果是56，这个数是多少．
<gadget id="calculator">56 / 4</gadget>
<output>14</output>

<gadget id="calculator">14 + 5</gadget>
<output>19</output>

<gadget id="calculator">19 * 3</gadget>
<output>57</output>

<gadget id="calculator">57 - 3</gadget>
<output>54</output>

<result>54</result>