The old principal has 20,000 yuan. If he buys treasury bonds, the five-year annual interest rate is 4.54%. If he deposits them in the bank, the five-year annual interest rate is 4.15%. Which one is more profitable? How much is the difference?
老校长有20000元人民币，如果购买国债，五年期的年利率是4.54%，如果存入银行，五年期的年利率是4.15%，那个收益大？相差多少元？
<gadget id="calculator">4.54 / 100</gadget>
<output>0.0454</output>

<gadget id="calculator">20_000 * 0.0454 * 5</gadget>
<output>4_540</output>

<gadget id="calculator">4.15 / 100</gadget>
<output>0.0415</output>

<gadget id="calculator">20_000 * 0.0415 * 5</gadget>
<output>4_150</output>

<gadget id="calculator">4_540 - 4_150</gadget>
<output>390</output>

<result>390</result>