Tomatoes and peppers are planted in Uncle Zhang’s vegetable field, and a row of peppers is interplanted between every two rows of tomatoes. The width of each row of tomatoes is 0.6 meters, and the width of each row of peppers is 0.4 meters. If 9 rows of tomatoes are planted in the vegetable field, how many meters is the width of the vegetable field?
张大伯家的菜地里种着番茄和辣椒，每两行番茄之间套种一行辣椒．每行番茄的宽是0.6米，每行辣椒的宽是0.4米．如果菜地里种了9行番茄，这块菜地的宽是多少米？
<gadget id="calculator">0.6 * 9</gadget>
<output>5.4</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">0.4 * 8</gadget>
<output>3.2</output>

<gadget id="calculator">5.4 + 3.2</gadget>
<output>8.6</output>

<result>8.6</result>