¡Saludos a todos! Les comparto mi código que utilice para solucionar el ejercicio.
let numeroTabla = 8;
document.write(numeroTabla + " x " + "1" + " = " + numeroTabla * 1 + "<br>");
document.write(numeroTabla + " x " + "2" + " = " + numeroTabla * 2 + "<br>");
document.write(numeroTabla + " x " + "3" + " = " + numeroTabla * 3 + "<br>");
document.write(numeroTabla + " x " + "4" + " = " + numeroTabla * 4 + "<br>");
document.write(numeroTabla + " x " + "5" + " = " + numeroTabla * 5 + "<br>");
document.write(numeroTabla + " x " + "6" + " = " + numeroTabla * 6 + "<br>");
document.write(numeroTabla + " x " + "7" + " = " + numeroTabla * 7 + "<br>");
document.write(numeroTabla + " x " + "8" + " = " + numeroTabla * 8 + "<br>");
document.write(numeroTabla + " x " + "9" + " = " + numeroTabla * 9 + "<br>");
document.write(numeroTabla + " x " + "10" + " = " + numeroTabla * 10 + "<br>");