AWSTemplateFormatVersion: 2010-09-09
Parameters:
  EBSVolumeSize:
    Type: Number
    Default: 10
    MinValue: 10
    MaxValue: 50
Resources:
  IopsCalculator:
    Type: AWSUtility::CloudFormation::CommandRunner
    Properties:
      Command:
        Fn::Sub: 'expr ${EBSVolumeSize} \* 20 > /command-output.txt'
Outputs:
  Iops:
    Description: EBS IOPS
    Value:
      Fn::GetAtt: IopsCalculator.Output