Teacher Wang brought 800 yuan, 638 yuan was used to buy a phone, and 86 yuan was used to buy a printer. How much money is left?
王老师带了800元钱，买一台电话用去了638元，买一台打印机用去86元，还剩多少元？
<gadget id="calculator">800 - 638 - 86</gadget>
<output>76</output>

<result>76</result>