The sum of the three numbers A, B, and C is 300, the number of A is 120, the ratio of the number B to the number C is 5:4, what is the number B
甲、乙、丙三个数的和是300，甲数是120，乙数和丙数的比是5：4，乙数是多少
<gadget id="calculator">300 - 120</gadget>
<output>180</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">180 * (5/9)</gadget>
<output>100</output>

<result>100</result>