On Saturday, Xiao Ming invites 7 friends to visit his house. His mother prepares a box of milk, which can just fill the following 6 full cups. If Xiao Ming and each child drink milk, how many milliliters will be poured in each cup on average? Cup: height 8cm, S bottom = 20 cubic centimeters.
星期六，小明请7位朋友来家做客，妈妈准备一盒牛奶，正好可以倒满下面6满杯，如果小明和每位小朋友都喝上牛奶，平均每杯倒多少毫升？杯子：高8cm，S底=20立方厘米．
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">6 / 8</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">20 * 8 * (3/4)</gadget>
<output>120</output>

<result>120</result>