INPUT ARTICLE: Article: Start at the farthest left column of the abacus. Say you're multiplying 34 and 12. You need to assign columns to "3", "4", "X", "1", "2", and "=". Leave the rest of the columns to the right open for your product. The "X" and "=" will be represented by blank columns. The abacus should have 3 beads up in the farthest column left, four up in the next farthest, a blank column, a column with one bead up, two beads up in the next, and another blank column. The rest of the columns are open. The order here is critical. You need to multiply the first column by the first column after the break, then the first column by the second column after the break. Next, you'll multiply the second column before the break by the first column after the break, then the second column before the break by the second column after the break. If you are multiplying larger numbers, keep the same pattern: start with the leftmost digits, and work to the right. Start recording in the first answer column, after the blank one for the "=" sign. You will keep moving beads on the right hand portion of the abacus as you multiply the individual digits. For the problem 34 x 12: First, multiply 3 and 1, recording their product in the first answer column. Push three beads up in that seventh column. Next, multiply the 3 and the 2, recording their product in the eighth column. Push one bead from the upper section down, and one bead from the lower section up. When you multiply the 4 and the 1, add that product (4) to the eighth column, the second of the answer columns. Since you're adding a 4 to a 6 in that column, carry one bead over to the first answer column, making a 4 in the seventh column (four beads from the bottom section pushed up to center bar) and a 0 in the eighth (all beads in their original starting position: the top section bead pushed up, bottom section beads pushed down). Record the product of the last two digits 4 and 2 (8), in the last of the answer columns. They should now read 4, blank, and 8, making your answer 408.

SUMMARY: Record the problem on the abacus. Multiply by alternating columns. Record the products in the correct order.

In one sentence, describe what the following article is about: Select System Preferences, and then open Keyboard & Mouse. Under the Trackpad Gestures section, check the box labeled "Tap trackpad using two fingers for secondary click". This will enable you to right-click using two fingers. Note: Depending on your OS X version, the labeling may vary. On older versions, the box is labeled "Secondary Click" and is located in the Two Fingers section. Press two fingers to the trackpad to right-click an object. With the secondary click enabled, doing this will open the right-click menu.
Summary: Click the Apple menu. Click the Trackpad tab. Place your cursor over what you want to click.

For comfort, use a foam exercise mat or a carpeted section of floor. Place your heels on a low table at an angle of at least 90 degrees. You may have seen people wrap their fingers behind their head while doing crunches - if you do this, you may accidentally stress your neck muscles. By wrapping your hands across your chest, you spare yourself the possibility of neck pain. Use your ab muscles to smoothly lift your upper body (keeping your neck relaxed) until you have gone as far as you can without lifting your lower back off the ground. Never use jerky movements - these can hurt your back. Begin to lower your upper body back down smoothly and slowly. Each time you reach the top of your crunch, hold this position for a second or two, then let yourself down slowly and repeat. If, at any point, you experience pain in your lower back, stop. After 20 repetitions, rest briefly (less than 1 minute), then do another set of 20. Do 2-4 sets, or go until you "feel the burn" - a light soreness in your abs that signifies the muscles in your stomach have been worked out.
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One-sentence summary -- Lie on your back. Cross your hands over your chest. Tense your abs and curl your upper body starting with your head. Hold this "crunched" position for a several seconds. Repeat. Repeat this exercise 20 times.

INPUT ARTICLE: Article: Moisture can make your silver tarnish more quickly than normal. When not in use, store your silver with desiccating packets filled with silica gel. These can usually be purchased at craft stores, general retailers, and hardware stores. If you have small children or pets, be sure these packets are inaccessible to them. Eating these packets could be deadly. Alternatively, store a piece of chalk with your silver. Similar to the desiccating packets, the chalk will absorb moisture. Chalk will also be less dangerous to children and pets. Anything that contains lemon juice or vinegar will likely cause your silver to tarnish very quickly. Forego using your silver when serving any acidic food. Mustard, onions, and eggs are some of the most common foods that contribute to rapid oxidation. Food that has a sour taste often has acidic properties. When in doubt, use non-silver items with food like this. In some cases, perspiration may be acidic enough to cause oxidation. Other possible culprits include perfume, makeup, hair products, and cleaning products. Rubber and latex will have a strong negative reaction to silver. They can permanently deface its finish or cause the metal to be eaten away. Avoid storing your silver with other metals. Doing so can also make the silver oxidize more quickly. The detergent and heat of your dishwasher can cause oxidation and corrosion in your silver. Silver should be cleaned with cool water and a mild soap. Use a soft cotton cloth to wipe dirty silver clean when necessary. Opposite of what you might expect, using your silver and cleaning it thoroughly by hand after every use can defend against oxidation. Even using your silver once a week could keep it looking oxidation free for longer.

SUMMARY:
Defend silver from moisture with desiccating packets. Avoid exposing silver to acidic substances. Store your silver away from rubber, latex and other metals. Hand wash your silver. Use silver more frequently.