How to calculate plant assets to long term debt ratio?

I know the formula is Net Plant Assets/Long term liabilities. I get 48.66 to 1. But that ratio seems like its too big. What am I doing wrong?

WHOLE FOODS MARKET, INC. Selected Financial Information (Amounts in millions except per share data) Sept 27, 2015 Sept 28, 2014 Total current assets Merchandise inventories Property and equipment, net of depreciation Total assets Total current liabilities Total long-term liabilities Total liabilities Total shareholders' equity $ 1,544 500 3,163 5,741 1,252 65 1,972 3,769 $ 1,756 441 2,923 5,744 1,257 62 1,931 3,813 $ 15,389 9,973 5,416 861 $ 14,194 9,150 5,044 934 Revenue Cost of goods sold Gross profit Operating income Earnings from continuing operations Before income taxes Income tax expense Net earnings Basic earnings per share 878 342 536 $ 1.49 946 367 579 $ 1.57