There are 2.54 cm in one inch and there are 18 inches in half a yard so there are 2.54 times 18 = 45.72 cm in half a yard.
Only basic disks can be cloned with Acronis True Image 2016. You cannot clone dynamic disks. Checking if you have basic or dynamic disks. You can use Windows Disk Management to see if you have basic or dynamic disks: Hit Start-Run and type in diskmgmt.msc.
This discrepancy occurs because dynamic disks contain entries in the partition table for the system volume or boot volume (if present on the disk). Dynamic disks also contain a partition that occupies the remainder of the disk and reserves space for use by dynamic volumes.