As the New Year is approaching, Xiaoxiao personally made 16 greeting cards and sent them to classmates and friends respectively. If each stamp is 8 cents, each envelope is 2 cents, and 16 greeting cards are sent, how much will it cost? (Answer in two ways.)
新年快到了，小小亲自制作了16张贺卡，分别寄给同学和朋友．如果每张邮票8角，每个信封2角，寄16张贺卡，要花多少元？(用两种方法解答．)
<gadget id="calculator">1 * 0.8 * 16</gadget>
<output>12.8</output>

<gadget id="calculator">8 / 40</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 16</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">12.8 + (16/5)</gadget>
<output>16</output>

<result>16</result>