--description--

Given a file size, a unit for the file size, and hard drive capacity in gigabytes (GB), return the number of files the hard drive can store using the following constraints:

• The unit for the file size can be bytes ("B"), kilobytes ("KB"), or megabytes ("MB").
• Return the number of whole files the drive can fit.
• Use the following conversions:

For example, given 500, "KB", and 1 as arguments, determine how many 500 KB files can fit on a 1 GB hard drive.

--hints--

numberOfFiles(500, "KB", 1) should return 2000.

assert.equal(numberOfFiles(500, "KB", 1), 2000);

numberOfFiles(50000, "B", 1) should return 20000.

assert.equal(numberOfFiles(50000, "B", 1), 20000);

numberOfFiles(5, "MB", 1) should return 200.

assert.equal(numberOfFiles(5, "MB", 1), 200);

numberOfFiles(4096, "B", 1.5) should return 366210.

assert.equal(numberOfFiles(4096, "B", 1.5), 366210);

numberOfFiles(220.5, "KB", 100) should return 453514.

assert.equal(numberOfFiles(220.5, "KB", 100), 453514);

numberOfFiles(4.5, "MB", 750) should return 166666.

assert.equal(numberOfFiles(4.5, "MB", 750), 166666);

--seed--

--seed-contents--

function numberOfFiles(fileSize, fileUnit, driveSizeGb) {

  return fileSize;
}

--solutions--

function numberOfFiles(fileSize, fileUnit, driveSizeGb) {
  const driveSizeBytes = driveSizeGb * 1000 * 1000 * 1000;

  let fileSizeBytes;
  if (fileUnit === "B") {
    fileSizeBytes = fileSize;
  } else if (fileUnit === "KB") {
    fileSizeBytes = fileSize * 1000;
  } else {
    fileSizeBytes = fileSize * 1000 * 1000;
  }

  return Math.floor(driveSizeBytes / fileSizeBytes);
}