SOURCE

function handleClick() {
    let val = parseInt(document.getElementById('input').value);
    const count = parseInt(document.getElementById(val > 100 ? 'max-add' :'min-add').value);
    const percentage = parseInt(document.getElementById('percentage').value) + 100;
    if (val) {
        val = Math.ceil(((val + count) * percentage) / 24 / 100) * 24;
    } else {
        val = '请输入';
    }
    document.getElementById('result').innerText = val;
}

<div>
    <div>
        <label>数量</label>
        <input id="input"></input />
    </div>
    <div>
        <label>小于100增加</label>
        <input id="min-add" value="2"></input />
    </div>
    <div>
        <label>大于100增加</label>
        <input id="max-add" value="15"></input />
    </div>
    <div>
        <label>百分百加成</label>
        <input id="percentage" value="3"></input />
    </div>
    <button onclick="handleClick()"">计算</button>
    <p>预补数: <span id="result"></span></p>
</div>