The school playground is a rectangle with a length of 105 meters and a width of 36 meters. Xiao Ming ran 4 laps along the playground. How many meters did he run in total?
学校的操场是长105米，宽36米的长方形，小明沿着操场跑4圈，他一共跑了多少米？
<gadget id="calculator">105 + 36</gadget>
<output>141</output>

<gadget id="calculator">141 * 2</gadget>
<output>282</output>

<gadget id="calculator">282 * 4</gadget>
<output>1_128</output>

<result>1_128</result>