Estimate the value by rounding the first number to the nearest ten.<br> 215 x 7 = <input min="0" type="number" id="imp4pg005q4d_1" class="lineinput" placeholder="?"> x <input min="0" type="number" id="imp4pg005q4d_2" class="lineinput" placeholder="?"> = <input min="0" type="number" id="imp4pg005q4d_3" class="lineinput" placeholder="?">