* {
    box-sizing: border-box;
}

.block {
    border: 1px solid #000;
    border-radius: 30px 0 0 30px;
    overflow: auto;
    height: 420px;
}

.block-2 {
    background: #dad876;
    display: inline-block;
    padding: 20px;
    margin: 5px 5px 5px 5px;
    width: 300px;
    height: 180px;
    border-radius: 20px;
    box-shadow: inset 0px 0px 20px 0px #000;
}