During Mother's Day, 240 students in the school gave gifts to their mothers. Among them, (2/3) students send flowers, and the students who send greeting cards are equivalent to (1/2) who send flowers. How many students send greeting cards?
母亲节期间全校有240名同学给母亲送礼物．其中(2/3)的同学送鲜花，送贺卡的同学相当于送鲜花的(1/2)．送贺卡的同学有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">240 * (2/3) * (1/2)</gadget>
<output>80</output>

<result>80</result>