Những câu hỏi như này em nên tính bằng máy tính nhé
Link
https://www.google.com.vn/search?q=m%C3%A1y+t%C3%ADnh+online&sxsrf=AOaemvLwTbCrSV6mzHzW7u6Vy7kEjiUZEg%3A1638268174941&source=hp&ei=Dv2lYYPeNobf2roP0bai2Ao&iflsig=ALs-wAMAAAAAYaYLHr8R2Ttxks7kCiHpKt7ULh197lJ1&oq=M%C3%A1y+ti&gs_lcp=Cgdnd3Mtd2l6EAEYAzIFCAAQgAQyBQgAEIAEMgUIABCABDIFCAAQgAQyBQgAEIAEMgUIABCABDIFCAAQgAQyBQgAEIAEMgUIABCABDIFCAAQgAQ6DAgjECcQnQIQRhD6AToECCMQJzoLCAAQgAQQsQMQgwE6CAguEIAEELEDOggILhCxAxCDAToICAAQgAQQsQM6CwguEIAEELEDEIMBUABY9xZgsRdoAnAAeACAAYADiAHfBpIBBTYuMy0xmAEAoAEB&sclient=gws-wiz