When using a calculator to calculate 3780/20-48, press 3780 on the keyboard, then press "/", then press 20, and finally press "-", then the screen should display how much.
在用计算器计算3780/20-48时，在键盘上按下3780后，接着按"/"，再按20，最后再按"-"，这时屏幕该显示多少．
<gadget id="calculator">3_780 / 20</gadget>
<output>189</output>

<gadget id="calculator">189 - 48</gadget>
<output>141</output>

<result>141</result>