text: const liquidWaterContent = 500000;
  const volumeOfOlympicSwimmingPool = 2500;
  const densityOfWater = 1000;
  
  module.exports = {
    partOne: () => {
      const cloudDiameter = 10;
      const cloudHeight = 16 - cloudDiameter;
  
      // volume of a cylinder is PI * radius^2 * height
      const cloudVolume = Math.floor(Math.PI * Math.pow(cloudDiameter / 2, 2) * cloudHeight);
  
      return cloudVolume;
    },
    partTwo: (cloudVolume) => {
      if (!cloudVolume) {
        return false;
      }
  
      return cloudVolume * liquidWaterContent;
    },
    partThree: (massOfWaterInCloud) => {
      if (!massOfWaterInCloud) {
        return false;
      }
  
      return Math.floor(massOfWaterInCloud / densityOfWater / volumeOfOlympicSwimmingPool);
    }
  };
  