Figure showing method for multiplying 1223 (left) by using 20 counters on lined reckoning board. From Raymond Lull Practica Compendiosa Artis, 1523.

• Contributor: World History Archive / Alamy Stock Photo
• Image ID: 2K01J6D
• File size: 60 MB (1.8 MB Compressed download)
• Releases: Model - no | Property - no
• Dimensions: 3822 x 5487 px | 32.4 x 46.5 cm | 12.7 x 18.3 inches | 300dpi
• Date taken: 13 March 2018
• Photographer: World History Archive

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This image could have imperfections as it’s either historical or reportage.

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