Add 3 to a number, multiply by 7, subtract 6, and finally divide by 5. The result is 10. What is the number?
一个数加上3，乘以7，再减去6，最后除以5，结果等于10，这个数是多少．
<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">7 / 5</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">3 * (7/5)</gadget>
<output>21/5 = around 4.2</output>

<gadget id="calculator">10 - (21/5)</gadget>
<output>29/5 = around 5.8</output>

<gadget id="calculator">(6/5) + (29/5)</gadget>
<output>7</output>

<gadget id="calculator">7 / (7/5)</gadget>
<output>5</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">50 + 6</gadget>
<output>56</output>

<gadget id="calculator">56 / 7</gadget>
<output>8</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<result>5</result>