body {
    font-size: 40px;
}

* {
    box-sizing: border-box;
}

.bl {
    background: hsl(217, 14%, 72%);
    width: 2500px;
    height: 1000px;
    margin: 50px;
    border: 1px solid #000;
    overflow: auto;
    border-top-left-radius: 40px;
    border-bottom-left-radius: 40px;
}

.block {
    background-color: #a6a970ed;
    display: inline-block;
    padding: 45px ;
    margin: 20px 10px ;
    border: 4px solid #0a0a0a;
    width: 700px;
    height: 550px;
    border-radius: 60px;
}