A bottle of cough syrup 240ml, the doctor told Uncle Zhang to take it in 4 days, 3 times a day. On average, Uncle Zhang should drink ((())/(())) of this bottle of cough syrup each time, how many milliliters should he drink on average.
一瓶止咳糖浆240毫升，医生叮嘱张大爷分4天服完，每天3次．张大爷平均每次应喝这瓶止咳糖浆的((())/(()))，平均每次喝多少毫升．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">240 * (1/12)</gadget>
<output>20</output>

<result>20</result>