Multiply 2 variables in javascript

<script>
    const value1 =document.querySelector(".value1");
    const value2 =document.querySelector(".value2");
    const value3 =document.querySelector(".value3");
    const value4 =document.querySelector(".value4");
    const value5 =document.querySelector(".value5");
    const value6 =document.querySelector(".value6");
    const value7 =document.querySelector(".value7");
    const value8 =document.querySelector(".value8");

    const slider1 =document.querySelector(".slider1");
    const slider2 =document.querySelector(".slider2");
    const slider3 =document.querySelector(".slider3");
    const slider4 =document.querySelector(".slider4");
    const slider5 =document.querySelector(".slider5");
    const slider6 =document.querySelector(".slider6");
    const slider7 =document.querySelector(".slider7");
    const slider8 =document.querySelector(".slider8");

    const uitslag =document.querySelector(".berekening");

    value1.textContent = slider1.value;
    value2.textContent = slider2.value;
    value3.textContent = slider3.value;
    value4.textContent = slider4.value;
    value5.textContent = slider5.value;
    value6.textContent = slider6.value;
    value7.textContent = slider7.value;
    value8.textContent = slider8.value;

    uitslag.textContent = value7 * value8;
</script>

Hi guys, I want to multiply value7 and value8 with eachother but I have no idea how to do this in javascript. After I multiplied the 2 different values with eachother I want to print this with the uitslag.textContent part. So if anyone can help me out with how I can multiply these two variables and then print them I would be very happy. Thanks in advance!