There is a rope with a length of 240 cm. From one end, make a mark every 4 cm and every 6 cm. Then cut the marked place. How many pieces of the rope are cut in total?
有一根长240厘米的绳子，从一端开始每4厘米作一个记号，每6厘米也作一记号，然后将标有记号的地方剪断，绳子共被剪成多少段．
<gadget id="calculator">240 / 4</gadget>
<output>60</output>

<gadget id="calculator">60 - 1</gadget>
<output>59</output>

<gadget id="calculator">240 / 6</gadget>
<output>40</output>

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

<gadget id="calculator">240 / 12</gadget>
<output>20</output>

<gadget id="calculator">20 - 1</gadget>
<output>19</output>

<gadget id="calculator">39 - 19</gadget>
<output>20</output>

<gadget id="calculator">59 + 20</gadget>
<output>79</output>

<gadget id="calculator">79 + 1</gadget>
<output>80</output>

<result>80</result>