There are 320 pots of chrysanthemums arranged in 8 rows. The distance between two adjacent pots of chrysanthemums in each row is 1 meter. How many meters is the length of each row of chrysanthemums?
有320盆菊花，排成8行，每行中相邻两盆菊花之间相距1米，每行菊花长多少米？
<gadget id="calculator">320 / 8</gadget>
<output>40</output>

<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">39 * 1</gadget>
<output>39</output>

<result>39</result>