Xiao Li drives from place A to place B to complete a job, which takes 420 kilometers. At the beginning, the car was traveling at a speed of 60 kilometers per hour. An accident happened on the way and it was delayed for 2 hours. In order to arrive at point B on time, Xiao Li had to increase his speed by 30 kilometers per hour. How many kilometers.
小李开车从甲地到乙地去完成一项工作，这一路要行420千米．开始时汽车以每小时行60千米的速度行驶，途中遇事耽误了2小时，为要按时到达乙地，小李必须把以后的速度每小时增加30千米，那么遇事地点距甲地多少千米．
<gadget id="calculator">420 / 60</gadget>
<output>7</output>

<gadget id="calculator">7 - 2</gadget>
<output>5</output>

<gadget id="calculator">60 * 5</gadget>
<output>300</output>

<gadget id="calculator">30 * 5</gadget>
<output>150</output>

<gadget id="calculator">150 - 420</gadget>
<output>-270</output>

<gadget id="calculator">300 + (-270)</gadget>
<output>30</output>

<gadget id="calculator">30 - 60</gadget>
<output>-30</output>

<gadget id="calculator">60 + (-30)</gadget>
<output>30</output>

<gadget id="calculator">30 / 30</gadget>
<output>1</output>

<gadget id="calculator">60 * 1</gadget>
<output>60</output>

<result>60</result>