Starting from 10.15 kilometers away from the forest garden, plant trees along the road along the forward direction, and plant a cypress every 50 meters. A car delivers trees from the forest garden to each planting point, and can only pull 4 trees each time. After transporting 12 trees, the car returned to the forest garden, and asked how many kilograms of fuel the car consumed at least? (2 kg of fuel consumption per 10 km)
从离林园10.15千米处开始，沿前进方向在马路一旁栽树，每隔50米栽一棵柏树．一辆汽车从林园给每个种植点送树，每次只能拉4棵．运完12棵后汽车返回林园，问汽车至少耗油多少千克？(每10千米耗油2千克)
<gadget id="calculator">10.15 * 1_000</gadget>
<output>10_150</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">10_150 + 150</gadget>
<output>10_300</output>

<gadget id="calculator">10_300 * 2</gadget>
<output>20_600</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">50 * 7</gadget>
<output>350</output>

<gadget id="calculator">10_150 + 350</gadget>
<output>10_500</output>

<gadget id="calculator">10_500 * 2</gadget>
<output>21_000</output>

<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">50 * 11</gadget>
<output>550</output>

<gadget id="calculator">10_150 + 550</gadget>
<output>10_700</output>

<gadget id="calculator">10_700 * 2</gadget>
<output>21_400</output>

<gadget id="calculator">20_600 + 21_000 + 21_400</gadget>
<output>63_000</output>

<gadget id="calculator">63_000 / 1_000 / 10</gadget>
<output>63/10 = around 6.3</output>

<gadget id="calculator">(63/10) * 2</gadget>
<output>63/5 = around 12.6</output>

<result>63/5 = around 12.6</result>