With the increasingly fierce competition in the communication market, a communication company’s mobile phone local call charges were reduced by a yuan per minute according to the original standard, and then reduced by 25%. The current charging standard is b yuan per minute. What is the original charging standard per minute? Yuan.
随着通讯市场竞争的日益激烈，某通讯公司的手机市话收费按原标准每分钟降低a元后，再次下调了25%，现在的收费标准是每分钟b元，则原收费标准每分钟为多少元．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>