Dad has collected 120 stamps, of which 30% have a face value of 8 cents, 45% have a face value of 1 yuan, and 25% have a face value of 2 yuan. What is the total face value of these stamps?
爸爸收集了120枚邮票，其中面值8角的占30%，面值1元的占45%，面值2元的占25%，这些邮票的总面值是多少元？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">120 * (3/10) * 0.8</gadget>
<output>28.8</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">120 * (9/20) * 1</gadget>
<output>54</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (1/4) * 2</gadget>
<output>60</output>

<gadget id="calculator">28.8 + 54 + 60</gadget>
<output>142.8</output>

<result>142.8</result>