The ratio of the numbers A, B, and C is 5:8:3, the number A is 9 less than the number B, what is the number C
甲、乙、丙三个数的比是5：8：3，甲数比乙数少9，丙数是多少
<gadget id="calculator">8 - 5</gadget>
<output>3</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>