code: function decompressValue(value) {
    if (value === 0)
      return 0;
  
    value--;
  
    let exp = value % 10;
  
    value = (value - exp) / 10;
  
    let n;
    if (exp < 9) {
      const last = value % 9;
      value = (value - last) / 9;
      n = value * 10 + last + 1;
    } else {
      n = value + 1;
    }
  
    while (exp > 0) {
      n *= 10;
      exp--;
    }
  
    return n;
  }
docs: Decompress value.
  @param {Number} value - Compressed value.
  @returns {Amount} value