utton class="pink function" id="divide">÷</button>
            </div>
            <div class="row">
                <button class="number" data-key="7">7</button>
                <button class="number" data-key="8">8</button>
                <button class="number" data-key="9">9</button>
                <button class="pink function" id="multiply">×</button>
            </div>
            <div class="row">
                <button class="number" data-key="4">4</button>
                <button class="number"