#div_1{
    background-color: aqua;
    height: 200px;
    width: 100%;
}
.math_1{
    background-color: blue;
    display: flex;
    gap: 5px;
    margin: 5px;
    
}
.math_2{
   background-color: gray;
    height: 60px;
    width: 160px;
    border-radius: 10px;
    text-align: center;
    line-height: 20px;
    color: white;
    font-size: 20px;
    cursor: pointer;
    
}
.math_2:hover{
    background-color: darkgray;
}