Xiaogang and his father went to the cow trading market, and his father drove the cows half an hour earlier than Xiaogang. Xiaogang arrived at his uncle's house on the way one hour after departure, and learned from his uncle that his father passed by here 5 minutes ago. Xiaogang did the math, he can still prepare food for his father and himself in 35 minutes, so that he can arrive at the market at the same time as his father, and it is known that his father travels 3 kilometers per hour, so how many kilometers will Xiaogang add to the distance to the market?
小刚和父亲去奶牛贸易市场，父亲赶着奶牛比小刚早出发半小时．小刚出发1小时后到达途中的舅舅家，从舅舅那里得知父亲5分钟前经过这里．小刚算了算，他还可以用35分钟为父亲和自己准备食，这样可以和父亲同时到达市场，已知父亲每小时行3千米，那么小刚加到市场的路程是多少千米？
<gadget id="calculator">60 - 5</gadget>
<output>55</output>

<gadget id="calculator">30 + 55</gadget>
<output>85</output>

<gadget id="calculator">85 / 60</gadget>
<output>17/12 = around 1.416667</output>

<gadget id="calculator">3 / 60</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 40</gadget>
<output>2</output>

<gadget id="calculator">(17/12) / 60</gadget>
<output>17/720 = around 0.023611</output>

<gadget id="calculator">3 * (17/720)</gadget>
<output>17/240 = around 0.070833</output>

<gadget id="calculator">(17/240) - (1/20)</gadget>
<output>1/48 = around 0.020833</output>

<gadget id="calculator">2 / (1/48) / 60</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">1 + (8/5)</gadget>
<output>13/5 = around 2.6</output>

<gadget id="calculator">3 * (17/12) * (13/5)</gadget>
<output>221/20 = around 11.05</output>

<result>221/20 = around 11.05</result>