Solve the equation: (3/20): 18%=((6.5)/(x)).
解方程：(3/20)：18%=((6.5)/(x))．
<gadget id="calculator">18 / 100</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">6.5 * (9/50)</gadget>
<output>1.17</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1.17 / (3/20)</gadget>
<output>7.8</output>

<result>7.8</result>