There are 180 TV sets in an electrical appliance store. The ratio of color TV sets to black and white TV sets is 5:4. How many color TV sets are there?
某电器商店有180台电视机，彩电与黑白电视的台数比是5：4，彩电有多少台．
<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>