A certain rocket has been launched 70 times, and only 7 times are unsuccessful. What is the success rate of the launch?
某种火箭进行了70次发射，只有7次不成功，发射的成功率是多少．
<gadget id="calculator">70 - 7</gadget>
<output>63</output>

<gadget id="calculator">63 / 70</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(9/10) * 1</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>