
function solution(num1, num2) {
return num1*num2;
}
1) margin: top right bottom left;
* auto : 끝까지 민다.
2) text-align: center;
3) background-image: url('')
background-position: ;
background-size: ;
4) display: flex;
flex-direction: row;
align-items: center;
justify-content: center;