title: ruby round off to two decimal place and keep zero
body: <p>i want to round off a number upto two decimal place in ruby such that </p>
  
  <p><code>(0.02 * 270187).round(2)</code> is 5403.74  which is correct </p>
  
  <p>but </p>
  
  <p><code>(0.02 * 278290).round(2)</code> is 5565.8 which is not consistent with previous one </p>
  
  <p>i want to make it look like 5565.80</p>
  
  <p>Please tell me how can i do it in ruby</p>