The price of a knife is 6 yuan. If Xiao Ming buys this knife, then the money ratio between Xiao Ming and Xiao Qiang is 3:5. If Xiao Qiang buys this knife, then the money ratio between Xiao Ming and Xiao Qiang is 9: 11. How much money did they have in total?
一把小刀的售价是6元，如果小明买了这把小刀，那么小明与小强的钱数比是3：5，如果小强买了这把小刀，那么小明与小强的钱数比是9：11．原来两人共有多少元钱．
<gadget id="calculator">9 / 20</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(9/20) - (3/8)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">6 / (3/40)</gadget>
<output>80</output>

<gadget id="calculator">80 + 6</gadget>
<output>86</output>

<result>86</result>